Improved coal-drilling machine



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Lettefrs Patent No. 97,080, dated November 23, 1869.

IMPROVED COAL-DRILLING- MACHINE.

The Schedule referred Ato in these'Letters Patent and making part of the same.

To all whom it lmay concen Beit known that I, JO'EN GRIMM, of Darlington township, in the county Eot Beaver, and State of Pennsylvania, have invented certain new and useful Improvements in Goal-Drilling Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of refer ence marked thereon, which forni a part of this specication.

The nature of my invention consists in the construction and combination of devices, whereby coal may be drilled ready to receive the powder, or other agent used for blasting-purposes.

In the accompanying drawings- Figure 1 is a perspective view of my invent-ion.

Figure 2, a section of some ofthe devices used.

Figure 3, a perspective view thereof.

Figure 4, a perspective view of the same.

Letters ofreference denote parts. Y

A standard,.A,.supports and carries most of the devices used, having an open part, A1, at or near the centre thereof, and at cach extremity, an ordinary screwed nut, A2, let into the. said standard A, in any `suitable manner. Said nuts A2 receive ordinary screwed bolts A3, carrying at their outer ends pointed pawls A, one to each.

The lower portion of said standard A, forming an elongation o'r slide, A5, as shown in fig. l, consists of square grooves A5, and is adjusted by means ofa setbolt, Ai, or, as shown in tig. 4, consists of plane surfa cis-with a bolt, A", perforatious A9 being through both, in such a manner, that upon prolonging the length of the standard A, by withdrawing the slide A5, the bolt Aa will pass through any of the holes or pertbrations, nnexposed.

A series of pertbrations, B, is onI the faceof said standard A, at or-near the open part A1 thereof.

l At right angles with said standard A and projecting across the same, and attached to the same by means of brackets C, having points C1 passing into said perforations B, is a screwed uut, C2, having bearings, and reciprocating, if required, in said brackets C, said nut C2 being hinged or made in two sections, and held to` gether, by means ofthe piu C, iu such a manner that upon the withdrawal of the same, said nut C2 may be opened to allow of the withdrawal of a lscrewed spindle, D, which is provided at one extremity with a socket, D, suitable for the attachment ot" any ordinary drill D?. At the other extremity, said spindle D is provided with an ordinary crank, D

Said standard A can, if required, be made with curved bearings It, tig. 3, on its face, andthe nut C be placed therein, by withdrawing the brackets C thereof.

'Ihe whole being so larranged,'that by tightening the screw-bolts A3, thc clamps A4 will bite and hold, relatively, into the root and floor of any ordinary coalmine, the nut C2, carrying the spindle D, with its accompanying devices DI D2 D, is attached to the standard A, as hereinbefore described, by the rotary action of the crank. Being turned in any ordil'iary manner, the drill D2 is revolved, cut-ting its` way into the coal, whilst the revolving motion of the spindle D causes the drill D2 to advance in proportion to the pitch of the worm on said spindle D. The nut C2 being pivoted, allows the drill to be attached, and actuated in any position or at any angle. After the drill D2 has penetrated a sufficient depth, by withdrawing the pinv C, the said nut expands, and the spindle D can be withdrawn without screwing back the same.

The pitch of the thread or worin on the spindle D, depends upon the nature of the coal or slate to be drilled. For bituminous or soft coal, a coarse pitch is required, but with cannel, or hard coal, a liner pitch is requisite.

I am aware that coal-drilling machines have been side requiring skilled .labor to manipulate the same,

oftentimes requiring two or more men to work one machine. My invention can be set up and worked by any ordinary miner, and as the devices are. simple, and thereby not liable to be disordered, much `ltime and expense are saved thereby.

Having thus-described the nature, construction, and operation of my invention,

XVhat I claim as new, and desire to secure by Leiters Patent, is-

1. The sliding standard A, having perforatons l, or bearings E upon its face, in combination with the screws A3 and pawls A, constructed and operating substantially as and for the purpose described.

2. The screwedvspindle D and crank D, in combination with the pivoted jointed nut 02, brackets 6,

and pin C, substantially as and for the purpose set fort-h.

3. The combination of the above parts in the construction of a coal-drill, whereby the drill 'can be set at any angle, and its feed regulated by the revolution of the spindle D, substantially as described and set forth.

In testimony that I claim the foregoing as my own, I aflix my signature, in presence of two witnesses.

JOHN GRIMM.

XVituesses:

IEncEvAL BEcKE'r'r, BENJAMIN FALLom 

